140731917 has 16 divisors (see below), whose sum is σ = 206108160. Its totient is φ = 85018032.

The previous prime is 140731901. The next prime is 140731919. The reversal of 140731917 is 719137041.

It is not a de Polignac number, because 140731917 - 2⁴ = 140731901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140731919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52363 + ... + 54984.

It is an arithmetic number, because the mean of its divisors is an integer number (12881760).

Almost surely, 2^140731917 is an apocalyptic number.

It is an amenable number.

140731917 is a deficient number, since it is larger than the sum of its proper divisors (65376243).

140731917 is a wasteful number, since it uses less digits than its factorization.

140731917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107392.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 140731917 is about 11863.0483856385. The cubic root of 140731917 is about 520.1527127902.

Adding to 140731917 its reverse (719137041), we get a palindrome (859868958).

The spelling of 140731917 in words is "one hundred forty million, seven hundred thirty-one thousand, nine hundred seventeen".